Compaq MC-1 Uživatelský manuál stáhnout pdf (Strana 91)

Release 0 34-ST-25-20 MC Toolkit User Manual 83

7/03

Reference Data

Table 31 Glossary

Item Definition Description

Conformity

Response form of

sensor.

User selection of PV conversion algorithm: Linear or Square Root

D/A Trim Digital to Analog

Trim

Adjustment to digital-to analog (output) conversion algorithm that

aligns minimum and maximum values of scaled digital range to

minimum (0%) and maximum (100%) values of analog output.

Damping Digital algorithm in transmitter MPU that reduces noise in a PV that

is generated in the process or induced in transmitter components.

EU Engineering

Units

A standard scale of values, selected by the user from a standard set for

convenient display and interpretation.

Input 1. Physical property (e.g., pressure) applied to a sensor

2. Digital value, calculated in the transmitter, that represents

magnitude of the physical input

Local Meter A device associated with a single transmitter and installed locally (in

the transmitter housing) or remotely (in a separate housing) that

displays variables sensed or calculated in the transmitter.

Loop Test

(In Analog Mode only) a set of commands from the HHC that causes

the transmitter to provide 0% (4 mA) and 100% (20 mA) for testing

proper operation of all components of the current loop.

LRL Lower Range

Limit

Minimum value in the useful range of the physical property of a

transmitter at which a sensor can operate.

LRV Lower Range

Value

Minimum value in a continuous range of "normal" process values.

Meter Units User-selected scale of values that provides for convenient

interpretation of values in the associated transmitter.

Output Analog or digital value, calculated from the input, that is transferred

from the transmitter to a receiver (e.g., process control equipment)

PV Process Variable Measured magnitude of a primary physical property such as pressure

or temperature.

PV Input Physical property such as pressure or temperature, applied to an input

sensor

PV Units Process Variable

Units

Standard scale of values of a PV, selected by the user for convenient

display and interpretation.

Sensor Type Standardized designation of the physical design property of a sensor

(e.g., DP, AP for pressure TC, RTD for temperature.)

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 109 110

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